Electrical computers and digital processing systems: memory – Storage accessing and control – Specific memory composition
Reexamination Certificate
2007-01-23
2007-01-23
Padmanabhan, Mano (Department: 2188)
Electrical computers and digital processing systems: memory
Storage accessing and control
Specific memory composition
C711S216000, C711S117000
Reexamination Certificate
active
10849832
ABSTRACT:
The present invention carries out cache management in such a manner that the management region required for cache management does not increase, and neither does the performance decline.It is possible to combine use of both a hierarchical directory method and a hash directory method, in order to manage cache data. In a hierarchical directory method, the desired data is retrieved by referring to respective tables T1to T7, in succession. In a hash directory method, the desired data is reached by referring to a hash table T10and tables T4to T7. Access conflicts between the respective methods are avoided by using the EDEV number and a portion of the VDEV number for a hash key. By combining use of both of these methods, it is possible to respond to cases where the storage capacity of the storage system has been increased, without having to raise the management region, and without causing a decline in performance.
REFERENCES:
patent: 4464713 (1984-08-01), Benhase et al.
patent: 4761737 (1988-08-01), Duvall et al.
patent: 5584005 (1996-12-01), Miyaoku et al.
patent: 6067547 (2000-05-01), Douceur
patent: 6292795 (2001-09-01), Peters et al.
patent: 6757794 (2004-06-01), Cabrera et al.
patent: 6839758 (2005-01-01), Sørensen
patent: 6973082 (2005-12-01), Devi et al.
patent: 2003/0050974 (2003-03-01), Mani-Meitav et al.
patent: 2005/0076066 (2005-04-01), Stakutis et al.
patent: 2005/0119994 (2005-06-01), Matsunami et al.
patent: 58-31460 (1983-02-01), None
Hoshino Sachiko
Nagasoe Yasuyuki
Sakaguchi Takashi
Hitachi , Ltd.
Masdon David
Mattingly ,Stanger ,Malur & Brundidge, P.C.
Padmanabhan Mano
LandOfFree
Storage system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Storage system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Storage system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3824346